Solriamfetol: what it treats, how to take it, side effects
Last updated September 3, 2026.
Solriamfetol is a wakefulness-promoting agent - it increases certain natural substances in the brain that control sleep and wakefulness. You may know it as Sunosi. For sleep apnea, it rides alongside the breathing treatment - never instead of it.
What does it treat?
Excessive daytime sleepiness caused by narcolepsy - and, alongside breathing devices or other treatments, the daytime sleepiness of obstructive sleep apnea.
How do you take it?
Once a day in the morning, exactly as directed - a morning-only drug, because the same wakefulness that fixes the day wrecks the night. It can be habit forming: the dose is the dose. The sleep apnea rule: the breathing device stays on every night - solriamfetol manages the daytime symptom, not the cause. Missed dose: skip it if the morning is gone; never double up, never take it after midday without your doctor's say.
Side effects to know
- Common: headache, dizziness, difficulty falling or staying asleep, nausea, diarrhea, constipation, loss of appetite, stomach pain.
- Serious - call your doctor immediately: the heart set - chest pain, fast or pounding heartbeat, shortness of breath; and the mind set - anxiety, agitation, seeing or hearing things that are not there, racing thoughts. Blood pressure and heart rate can rise: the checks come with the drug.
Who should not take it?
High blood pressure, heart disease, and kidney disease shape the dose. Flag mental-health history - anxiety, psychosis, bipolar. Alcohol interacts. Pregnancy: the conversation comes first. It is a controlled substance - habit-forming potential is real.
When is it an emergency?
Chest pain, a racing heartbeat with shortness of breath, or hallucinations is urgent care. For an overdose, call Poison Control at 1-800-222-1222. Pymander's escalation routing is built and tested specifically for this class of decision; see the safety architecture working paper.
What a Pymander AI doctor consult looks like
Illustrative example, not a real member's messages.
Common questions
Why do I still need the CPAP if this keeps me awake?
Different jobs: solriamfetol manages the daytime symptom - sleepiness; the CPAP treats the cause - the breathing interruptions shredding your sleep architecture all night. Stopping the device because the days feel better is the classic trap: the nights get worse silently, and the daytime drug fights a losing battle. The pair is the treatment; neither replaces the other.
Why morning only?
The wakefulness is the point and the problem: the same brain substances that clear the daytime fog will occupy your night if the drug is still on board at bedtime. Once in the morning, same time - and the afternoon dose that tempts on hard days is exactly the one that costs the night. A missed morning dose is skipped, not compensated at 2 PM.
Is it habit forming?
It is a controlled substance - the potential is real: the dose is the dose, and chasing extra wakefulness with extra tablets is the path the schedule exists to block. Used at the prescribed morning dose for a real diagnosis, dependence stays a theoretical risk; the diary and the prescriber visits keep it that way.
What does it do to blood pressure?
It can raise blood pressure and heart rate - the checks come with the drug: at the start, after dose changes, and periodically after. High blood pressure and heart disease shape the dose before the first tablet. The report-fast set: chest pain, fast or pounding heartbeat, shortness of breath.
What if the daytime sleepiness comes back?
Report it, never self-escalate: breakthrough sleepiness has causes - device compliance slipping, weight change, the dose needing review, another sleep disorder joining - and each has a different fix. The afternoon nap question and the caffeine budget both belong to the sleep specialist's plan, not improvisation.
What happens if I miss a dose of solriamfetol?
If the morning is gone, skip it - a late dose costs the night, and the night is what the whole regimen protects. Never double up. One missed morning is a groggy day, not a crisis; the 7 AM anchor keeps them rare.